▍1. STM32F407-printf-keil5
该源码公示了怎样使用STM32F407的串口进行收发数据,在keil5编译环境中进行编译。需要将STM32F407的串口1与USB串口相连,即可以实现电脑桌面串口调试助手的调试。(The source of the public how to use STM32F407 serial port to send and receive data, compiled in keil5 compilation environment. We need STM32F407 serial port 1 is connected to the USB port, which can achieve desktop debugging serial debugging assistant.)